1. Cincinnati Children's Hospital Medical Center; Cincinnati Ohio
2. Pediatric Rheumatology Research Institute; Bad Bramstedt Germany
3. Hospital México Americano; Guadalajara Mexico
4. Panorama Medical Centre; Cape Town South Africa
5. Hospital Angel C. Padilla; Tucumán Argentina
6. Hospital Universitario y Politécnico de La Fe; Valencia Spain
7. Hospital Sant Joan de Déu; Barcelona Spain
8. Hospital Star Medica; Merida Mexico
9. Hospital General de Niños Pedro de Elizalde; Buenos Aires Argentina
10. Asklepios Clinic Sankt Augustin; Sankt Augustin Germany
11. Hamburg Centre for Pediatric and Adolescent Rheumatology; Hamburg Germany
12. Togliatti City Clinical Hospital No.5; Togliatti Russia
13. Randall Children's Hospital at Legacy Emanuel; Portland Oregon
14. CAICI Institute; Rosario City Argentina
15. Universitair Ziekenhuis Gent; Ghent Belgium
16. Université catholique de Louvain; Brussels Belgium
17. Clínica Anglo Americana; Lima Peru
18. Hospital de Niños de la Santísima Trinidad; Córdoba Argentina
19. University Hospital Gasthuisberg; Leuven Belgium
20. University of Utah School of Medicine; Salt Lake City
21. Steve Biko Academic Hospital, University of Pretoria; Pretoria South Africa
22. Pédiatrie 1, CHU Hautepierre; Strasbourg France
23. University Hospital; Heidelberg Germany
24. German Rheumatism Research Center and Charité University Medicine; Berlin Germany
25. Hospital Nacional Edgardo Rebagliati Martins; Lima Peru
26. University of Pretoria; Pretoria South Africa
27. Universidad Autónoma de Nuevo León, Hospital Universitario Dr. J. E. González; Monterrey Mexico
28. CHU de Poitiers, Rheumatology; Poitiers France
29. University of the Free State; Bloemfontein South Africa
30. Bristol-Myers Squibb; Princeton New Jersey
31. Bristol-Myers Squibb; Braine-L'Alleud Belgium
32. Istituto Giannina Gaslini; Genoa Italy